Then they compared these musical intervals with those between important tonal frequencies in spoken vowels uttered by American English speakers in either excited or subdued voices.
然后，他们把这些音乐片段与讲英语的美国人所发出的口语中韵母的重要的音频段相比较，这些口语有的是兴奋的声音，有的是轻柔的声音。
They sang at intervals throughout the night, and were again as musical as ever just before and about dawn.
整夜它们不时地唱，而在黎明前，以及黎明将近时唱得尤其富于乐感。
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